Machinery Malfunctions. Test 6

The amount, condition and appearance of liquid collecting in bilges over time is a sign of _____ ?

specific system losses.
flooding taking place.
sloppy engine room management.
leakage or overflow.

What is the function of item 'PC' ?

Pressure Container activating automatic pressure release valve
Pressure Container admitting air to air bottle
Pressure Controller activating 3-way valve solenoid
Piston Controller activating compressor piston movement

After water-washing the turbocharger exhaust side, the blower starts to vibrate. What has happened?

The rotor blades are damaged or the blades are not properly cleaned
Foundation bolts for the blower unit are loose
Water drain for washing system is clogged
Inlet filter partly clogged.

When a new cylinder liner is fitted to a 2-stroke engine, which of the following steps should be taken ? I. Increase the cylinder oil flow. II. Reduce the cylinder load. III. Reduce the oil flow.

I, II and III
I and II
I and III
II and III

Which are the parameters that steer the automatic level control system of the boiler shown here ?

Water level and steam consumption.
Feedvalve and feed by-pass valve.
The level transmitter.
The level controller.

What is item 'U' and how does it act on item 'S' ?

Item 'U' is the upper pressure limit valve activating the solenoid.
Item 'U' is the uplifter of the air bottle's safety valve.
Item 'U' is the activator for the safety release valve.
Item 'U' is the unloader lifting the compressor suction valve.

When taking a set of crankshaft deflections the + sign is indicated, example +4. This means that _____

the crankwebs have closed in by 4/100 mm.
one main bearing on one side is 4/100 mm bigger than the other.
the crankpin location is 4/100 mm out of centre.
the crankwebs have opened up by 4/100 mm.

In the operation shown what is being checked?

Axial location of the labrynth gland.
Axial position of the compressor impeller.
Axial movement in the thrust bearings.
Turbine wheel/nozzle clearance.

If the performance of a centrifugal pump deteriorates over time (tons/hour x height in metres) it is usually due to _____

condition of the ball bearing.
cavitation of the impeller.
condition of the pump housing.
excessive wear between impeller and wear ring.

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Machinery Malfunctions. Test 6

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